I've posted my experience before but more than happy to again 
I have suffered really bad depression. Particularly in 2005/6 during which I was hospitalised. I was taking Fluoxetine. I experienced really bad side effects and eventually came off them. I was reluctant to take any medication after that. I started counselling but it was terrible, different counsellor each time, no continuity and seemingly no interest. I got angry and had had enough. I realised that no meds or any counsellors were going to help me and that, if I wanted my life to get better, I had to do it my bloody self.
I began by totally accepting that depression was and probably always would be, part of me. That was a bit of a relief actually, took away the "pressure" to "get well" or be "cured" etc.
Then (and this may sound silly but it works for me) when I wake each morning I evaluate how I feel. If I feel ok, all well and good 
If I feel a bit down, or feel my (I say "my" as I "own it") depression looming then I try and attribute my feeling down to anything BUT my depression. So I will tell myself that it's because I didn't sleep well, or because I've got xyz on my mind, worried about abc bill.
Because it's all to easy to put every mood, down feeling and stick it under the umbrella of Depression. It could just be a "bad day" like non-sufferers would call it.
Attributing it to anything other than my depression doesn't always work. I sometimes let it rear it's head and stick it's nose out. That's when I'll be a bit subdued, have an early night, clutch the duvet a bit tighter, be kind to myself. But I'll acknowledge it. I'll throw my hands up and say "You know what? Yup, today you got me. But I'm going to rest and you WILL subside until the next time".
But I feel in CONTROL of it, rather than the other way around. It works for me, may work for others, may not/never work for some. But I've been "settled" for the last 7 years.
I had a wobble a few months ago and went to the GP (I know that sounds contradictory) I'm not sureif it was because we'd had a few bereavements, I work FT, DD is 6, I had had a virus, just exhausted really. I had been reading about St Johns Wort and wanted to ask the GP's advice. She recommended trying it. It's been good
. More of a tonic effect for me but I certainly feel less frazzled at present.
Good luck, I hope you find something that works for you 